Bunker Einsiedelstraße, High-rise air-raid bunker in St. Lorenz Nord, Lübeck, Germany

Bunker Einsiedelstraße is a conical concrete tower with nine floors, marked by a distinctive narrowing between its main body and roof peak. The structure features steeply sloping walls designed by Leo Winkel's patent method and includes an observation post at its top.

Built in 1940 on the grounds of the Lübeck Machinery Company, the bunker was designed to protect 500 workers during air raids. After the war, rectangular openings were cut into its walls as part of demilitarization.

The shingled roof imitates medieval defensive architecture, a deliberate contrast to the exposed concrete of the nine-storey cone. A metal flag of the Lübecker Maschinenbau Gesellschaft tops the roof peak, and a sign names the builder, Fr. Brüggemann of Hamborn.

The steeply sloping walls were designed to deflect incoming bombs and protect the structure from impact. From Lübeck's old town, the building is clearly visible and dominates the industrial area of St. Lorenz Nord.

The bunker's roof peak carries a small metal flag of the Lübecker Maschinenbau Gesellschaft, the machinery company whose grounds it stood on. A sign on the structure names the builder, the firm Fr. Brüggemann from Hamborn. Both details are easy to miss when looking up at the nine-storey cone.